Improvement



M. P. GARDNER. V

r Millstone Dress. y

Patented Jan.

UNITED STATES PATENT OFFICE.'

M. P. GARDNER, OF HUNTINGTON, INDIANA.

IMPROVEMENT IN MILLSTONE-DRESSING.

To all whom it may concern.-

Be it known that I, MICHAEL P. GARDNER, of Huntington county, and Stateof Indiana, have invented a new and Improved Plan for DressingMillstones; and I do hereby declare that the followingis a full andexact description thereof, reference being had to the accompanyingdrawings, and to the letters of reference marked thereon.

The nature of my invention consists in providing a rule whereby thelines of dressing on the bed-stone and runner may be cut parallel toeach other, so as to perfectly coincide, thus cutting the grain in allparts alike, instead of being cut transversely, so as to come togetherlike shears, cutting a part too fine anda'part too coarse, asheretofore.

To enable others skilled in the art to make the ruler for and use myinvention, I herewith describe its construction and operation.

The rule or straight-edge as seen in Figure 3 of diagram is made of Woodabout one-inch thick, about four inches Wide at B and eight inches Wideat M, and from eighteen inches to three feet in length, according to thesize of the stone.

A, G, and H are spindle-holes.

Fig. 1 represents the bed-stone; Fig. 2, the ruimer.

Place the rule No. 3 on the runner No. 2,

by turning mark the lines F. Then turn over the rule No. 3 and place thesame point A on the spindle O and draw the lines D, Which lines F on therunner and D on the bed-stone Will exactly coincide with each other, andinstead of cutting upon the principle of shears, pushing the grainoutward,y as under the old method, will cut perfectly equal from centerto circumference. When a greater draft is desired, place the point G onthe spindle E, and, by turning, such lines as seen at I are drawn. Thenreversing and placing same point G on C, the lines J are drawn, which inrunning Will coincide, as before. For still greater draft,use the pointor hole at H, cutting the lines K on No. 2 and L on No. 1.

What I claim as my invention, and desire to secure by Letters Patent,is-

The construction and use of the rule, as described and seen in Fig. 3 ofdrawings hereunto annexed, to determine and mark out for cuttingparallel lines of dress, so that in running they may perfectly coincideone With the other, as to run more steadily and cut the grain evenly anduniformly.

November 1, 1861.

M. P. GARDNER.

Attest:

WILLIAM G. DUNLOP, JOHN B. CALDWELL.

